PTFE
PTFE is a chemically inert fluoropolymer widely used as a Spiral Wound Gasket filler for aggressive chemical service where broad chemical resistance and low contamination are important.
PTFE Grade Information
PTFE is a chemically inert fluoropolymer widely used as a Spiral Wound Gasket filler for aggressive chemical service where broad chemical resistance and low contamination are important.
Legacy British reference for fabricated unfilled PTFE products. It is relevant when interpreting an older material purchase description.
| Material specification | BS 6564-2 |
|---|---|
| Material identification | Polymer — UNS not applicable |
| Product / supply condition | Historical fabricated unfilled PTFE products; confirm form and grade. |
PTFE Chemical Composition
Polymer identity and resin classification, not metallic elemental composition.
| Element / description | Material description |
|---|---|
| Material | Polytetrafluoroethylene |
| Qualification | Virgin / unfilled for AMS 3667; check the required resin designation for IS 14635. |
PTFE Mechanical Properties
Published reference values for the stated form and condition. Typical values are not specification acceptance limits.
Mechanical requirements depend on resin type, processing route, product thickness and specimen preparation. Specify the actual PTFE product and apply the tests in the ordered specification.
Manufacturer reference data is shown for comparison. Use the selected BS 6564-2 edition and certified material test results for acceptance. Confirm specimen direction, gauge length, thickness and heat treatment.
BS 6564-2 Grade Reference
Polymer — UNS not applicable
| Material specification | BS 6564-2 |
|---|---|
| Source edition | BS 6564-2:1991 |
| Publication status | Withdrawn — 15 May 1998 |
| Product / supply condition | Historical fabricated unfilled PTFE products; confirm form and grade. |
| Specification information | This historical product standard must not be treated as a current specification or as coverage for every PTFE filler formulation. The supplier must identify the actual product, grade and certification requirements. |
| Comparison tables | View the BS 6564-2 comparison tables |
| Material overview | View PTFE in Materials |
| Source reference | BSI — BS 6564-2:1991 fabricated unfilled PTFE products, withdrawn 1998 |
| Source reference | SAE — AMS3667E virgin, unfilled molded PTFE sheet, stabilized 2011 |
| Source reference | BIS — IS 14635 (Part 1):2025 fluoropolymer designation system, current publisher record |
| Source reference | BIS — IS 14635 (Part 1):2020 product manual (historical PTFE scope, not the 2025 acceptance tables) |
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